.app {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

.loading,
.error {
    text-align: center;
    padding: 20px;
    margin: 20px 0;
}

.error {
    color: red;
    border: 1px solid red;
    border-radius: 4px;
}